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gregorygrice wrote:Ironically the bridge went up this past Saturday at about 7:15PM (I don't know why). Also I've been noticing a lot of tie work being done on the bridge these past weekends. Stupid question, but I see there are replacing the wood ties with more wood. Why not concrete?Where have you ever seen concrete bridge ties on an open deck bridge? Especially a moveable bridge?
DutchRailnut wrote:how would you secure concrete to steel bridge girder and the concrete would trow off the bridge weight ballance with counter weights.The reason I asked is because I recently got one of the old copies of the "On Track" magazine and say an article on concrete ties in there. There was also a photo of a CN tie machine laying concrete ties on one of the bridges on the Harlem Line. Ill try and scan the photo later.
the reason the ties needed replacemet was because of recent tie fires.
The bridge is getting considerably more than a face-lift — a top-to-bottom overhaul that has a price tag of $47.2 million and involves installing new cables to raise and lower the 340-foot-long track sections. Also scheduled are a new electrical control system, new wiring and new power-supply equipment for the third rail on the tracks.Back in 2010, for the one and only time in over fifty years of riding, was I on a train that was halted due to the bridge being raised. It was a mid-evening train on a Saturday night that was halted after leaving 125th Street because the bridge was being raised. This was when the City of New York was replacing the nearby Willis Avenue Bridge (1st Avenue). We were stopped so tugs with heavily laden barges bearing bridge components could pass through. The train crew explained that normally we would've been held at 125th Street except the RTC had been trying to get us through first. The crew said they were told that because of the way the tides were running it would have been hazardous to require the tugs to try and stop. So we stopped!
DutchRailnut wrote:other than testing, it hardly gets opened, it needs to be working however so cranes etc can be brought in to maintain other nyc bridges on that waterway.Let me get this straight, the bridges on the Harlem river need to be able to open so that the other bridges can get maintenance so that they can open so that other bridges can be maintained. It sounds like the bridges need to open for each other and not for real water traffic. The fireboat however sounds like a legitimate opening, although if there was an emergency I doubt they could make it in time because one bridge or another is always broken.
zerovanity59 wrote:There's a fair amount of boat landings upstream and barge traffic downstream. It's that midsection of the river that's pretty much dead.DutchRailnut wrote:other than testing, it hardly gets opened, it needs to be working however so cranes etc can be brought in to maintain other nyc bridges on that waterway.Let me get this straight, the bridges on the Harlem river need to be able to open so that the other bridges can get maintenance so that they can open so that other bridges can be maintained. It sounds like the bridges need to open for each other and not for real water traffic. The fireboat however sounds like a legitimate opening, although if there was an emergency I doubt they could make it in time because one bridge or another is always broken.
